Vehicle display screen safety and privacy system

ABSTRACT

A system for improving safety while providing privacy for a vehicle. The system includes a display screen located within the vehicle, configured to alternate between a displaying state and a non-displaying state. The system includes a window configured to alternate between an opaque state and a transparent state. The system includes an electronic control unit (ECU) configured to determine whether the display screen is powered on. The ECU is configured to alternate the display screen between the displaying state and the non-displaying state at a predetermined frequency when the display screen is powered on. The ECU is configured to alternate the window between the opaque state and the transparent state at the predetermined frequency, the display screen being in the displaying state when the window is in the opaque state and the display screen being in the non-displaying state when the window is in the transparent state.

BACKGROUND 1. Field

The present disclosure relates to a system for improving safety whileproviding privacy, and more particularly to a system for improvingsafety while providing privacy for display screens within a vehicle.

2. Description of the Related Art

Vehicles, such as automobiles, may contain one or more devices havingdisplay screens within a passenger cabin of the vehicle. For example, avehicle may include a navigation and/or media system integrated into adashboard of the vehicle. A vehicle may also include an entertainmentunit capable of playing a DVD, a video game, or television. The displayscreens of these entertainment units may be located on the headrest of aseat, facing a rear passenger of the vehicle.

However, the display screens of the devices within the vehicle may be adistraction to other drivers who are driving behind the vehicle. Inaddition, an occupant of the vehicle may wish to have the display screenblocked from the view of others outside the vehicle. Thus, there is aneed for systems and methods for providing safety and privacy withrespect to display screens within a vehicle.

SUMMARY

What is described is a system for improving safety while providingprivacy for a vehicle. The system includes a display screen locatedwithin the vehicle, and configured to alternate between a displayingstate and a non-displaying state. The system also includes a window ofthe vehicle configured to alternate between an opaque state and atransparent state. The system also includes an electronic control unit(ECU) connected to the window and the display screen. The ECU isconfigured to determine whether the display screen is powered on. TheECU is also configured to alternate the display screen between thedisplaying state and the non-displaying state at a predeterminedfrequency when the display screen is powered on. The ECU is alsoconfigured to alternate the window between the opaque state and thetransparent state at the predetermined frequency, the display screenbeing in the displaying state when the window is in the opaque state andthe display screen being in the non-displaying state when the window isin the transparent state.

Also described is a vehicle including a display screen located at adisplay screen location within the vehicle. The vehicle also includes awindow having a plurality of regions, each region configured totransition between an opaque state and a transparent state. The vehiclealso includes an outside viewer sensor configured to detect spatial dataassociated with an outside viewer located outside of the vehicle. Thevehicle also includes an electronic control unit (ECU). The ECU isconfigured to determine whether the display screen is powered on. TheECU is also configured to determine an outside viewer location based onthe spatial data when the display screen is powered on. The ECU is alsoconfigured to determine a viewing region of the window through which theoutside viewer views the display screen based on the display screenlocation and the outside viewer location. The ECU is also configured toset the viewing region of the window to the opaque state.

Also described is a method for providing privacy for a vehicle having arear window and a display screen located at a display screen location.The method includes detecting, by an outside viewer sensor, spatial dataassociated with an outside viewer located outside of the vehicle. Themethod also includes determining, by an electronic control unit (ECU),whether the display screen is powered on. The method also includesdetermining an outside viewer location based on the spatial data whenthe display screen is powered on. The method also includes determining,by the ECU, a viewing region of the window through which the outsideviewer views the display screen based on the display screen location andthe outside viewer location. The method also includes setting, by theECU, the viewing region of the window to the opaque state.

BRIEF DESCRIPTION OF THE DRAWINGS

Other systems, methods, features, and advantages of the invention willbe or will become apparent to one of ordinary skill in the art uponexamination of the following figures and detailed description. It isintended that all such additional systems, methods, features, andadvantages be included within this description, be within the scope ofthe invention, and be protected by the accompanying claims. Componentparts shown in the drawings are not necessarily to scale, and may beexaggerated to better illustrate the important features of theinvention. In the drawings, like reference numerals designate like partsthroughout the different views, wherein:

FIG. 1A illustrates a perspective view of an exemplary situation for thevehicle display screen safety and privacy system, according to anembodiment of the invention;

FIG. 1B illustrates an outside viewer point of view of an exemplarysituation for the vehicle display screen safety and privacy system,according to an embodiment of the invention;

FIGS. 2A and 2B depict block diagrams of components of the vehicledisplay screen safety and privacy system, according to embodiments ofthe invention;

FIG. 3 illustrates an outside viewer point of view in the vehicledisplay screen safety and privacy system, according to an embodiment ofthe invention;

FIG. 4 is a graph of elements of the vehicle display screen safety andprivacy system, according to an embodiment of the invention;

FIG. 5 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention;

FIG. 6 illustrates an outside viewer point of view in the vehicledisplay screen safety and privacy system, according to an embodiment ofthe invention;

FIG. 7 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention;

FIGS. 8A and 8B illustrate perspective views of the vehicle displayscreen safety and privacy system, according to embodiments of theinvention;

FIG. 9 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention;

FIGS. 10A-10C illustrate a driver point of view in the vehicle displayscreen safety and privacy system, according to an embodiment of theinvention; and

FIG. 11 illustrates a perspective view of the vehicle display screensafety and privacy system, according to an embodiment of the invention.

DETAILED DESCRIPTION

Disclosed herein are systems and methods for providing privacy for adisplay screen within a vehicle. The systems and methods provide severalbenefits and advantages such as reducing distractions for other driversby obscuring a view of a display screen within the vehicle. In addition,occupants within the vehicle with the display screen have an increasedsense of privacy. The systems and methods obscure the display screenand/or the vehicle window in order to prevent or block an outsideviewer's view to the display screen within the vehicle.

An exemplary system includes a display screen located within thevehicle, and configured to alternate between a displaying state and anon-displaying state. The system also includes a window of the vehicleconfigured to alternate between an opaque state and a transparent state.The system also includes an electronic control unit (ECU) connected tothe window and the display screen. The ECU is configured to determinewhether the display screen is powered on. The ECU is also configured toalternate the display screen between the displaying state and thenon-displaying state at a predetermined frequency when the displayscreen is powered on. The ECU is also configured to alternate the windowbetween the opaque state and the transparent state at the predeterminedfrequency, the display screen being in the displaying state when thewindow is in the opaque state and the display screen being in thenon-displaying state when the window is in the transparent state. Thepredetermined frequency exceeds a value such that the alternating of thedisplay screen between the displaying state and the non-displaying stateand the alternating of the window between the opaque state and thetransparent state are undetectable using human vision.

As used herein, and as can be understood by one skilled in the art, theterm “opaque” may refer to tinting, coloring, or obscuring of variousdegrees of light transmittance (e.g., 100% opaque, 90% opaque, 50%opaque, etc.). For example, a window set to an opaque state may be fullyopaque such that no light passes through the window, or may be partiallyopaque, such that 50% of light passes through the window.

FIG. 1A illustrates a perspective view of an exemplary situation for thevehicle display screen safety and privacy system, according to anembodiment of the invention. In many situations, a vehicle 100 having awindow 102 drives ahead of a secondary vehicle 150. In many embodiments,the window 102 is a rear window of the vehicle 100. In some embodiments,the window 102 is a side window of the vehicle 100. The vehicle 100 mayhave one or more outside viewer sensors 110 for determining a relativelocation of the secondary vehicle 150 to the vehicle 100. In someembodiments, the outside viewer sensors 110 (and associated detectionand/or processing devices) are configured to determine a location of adriver 152 and/or a passenger 154 of the secondary vehicle 150. Inparticular, the outside viewer sensors 110 may be used to determine aneye location or an eye level of the driver 152 and/or the passenger 154.

In some situations, the driver 152 or the passenger 154 of the secondaryvehicle 150 may be able to look into the vehicle 100 through the window102. FIG. 1B illustrates an example embodiment of one such situation,from the perspective of the driver 152 or the passenger 154 of thesecondary vehicle 150, generally referred to herein as an outsideviewer. In some embodiments, the outside viewer is a pedestrian, onfoot. The outside viewer is able to see through the rear window 102 ofthe vehicle 100 to view one or more display screens 106 located insidethe vehicle 100. In some embodiments, the display screens 106 are fordifferent devices, such as a navigation system, a personal mobile device(e.g., smartphone, tablet, or laptop) or an entertainment unit (e.g., aDVD player, a satellite television receiver, an internet connected mediadevice capable of streaming content from a remote server over theinternet, or a video game console).

In some situations, the outside viewer being able to see into thevehicle 100 and the display screens 106 therein may be a distraction tothe outside viewer. When the outside viewer is a driver of anothervehicle (as illustrated in FIG. 1), the distraction may pose a safetyhazard. In addition, an occupant of the vehicle 100 may have a privacyconcern regarding the outside viewer's ability to see into the vehicle100 and the display screens 106 therein. The system provides privacy forthe vehicle 100 by obscuring the window 102 between the outside viewerand the display screens 106.

In some embodiments, the window 102 and the display screens 106 arecoordinated in such a way that the window 102 rapidly alternates betweenan opaque state and a transparent state and the display screens 106rapidly alternate between a displaying state and a non-displaying state,at the same frequency. In addition, the window 102 alternates states ata sufficient frequency such that a person viewing the window 102 doesnot notice that the window 102 is alternating between the opaque andtransparent states. Accordingly, the display screens 106 alternatebetween the displaying and non-displaying states at the same frequency,such that a person viewing the display screens 106 does not notice thatthe display screens 106 are alternating between the displaying andnon-displaying states. In order to obscure the display screens 106 tothe outside viewer, the window 102 is in the opaque state when thedisplay screens 106 are in the displaying state and the window 102 is inthe transparent state when the display screens 106 are in thenon-displaying state.

In other embodiments, the entire window 102 is in an opaque state when adisplay screen 106 is in a displaying state. In other embodiments, thesystem determines an eye location or an eye level (or an eye viewingangle) of the outside viewer and portions of the window 102corresponding with the display screens 106 from the point of view of theoutside viewer are obscured by being in an opaque state and a remainderof the window 102 is in a transparent state.

In yet other embodiments, the window 102 is polarized in a firstdirection and the display screens 106 are polarized in a seconddirection, such that light from the display screen 106 is filtered outby the window 102.

FIG. 2A is a block diagram of the vehicle 100 with an integrated device206, in accordance with an embodiment of the invention. The vehicle 100includes an electronic control unit (ECU) 202, the window 102, a device206 with the display screen 106, the sensor 110, a memory 208, and therear view mirror 104 with a driver eye sensor 1004 (and associateddetection and/or processing devices).

The device 206 may be any integrated device within the vehicle 100, suchas a navigation system, an entertainment unit or an infotainment system.The device 206 is connected to the ECU 202 via a wired connection. Forexample, when the device 206 is an integrated navigation system, anintegrated entertainment unit or an integrated infotainment system, awired connection may be established between the ECU 202 and the device206 using a cable, such as a Universal Serial Bus (USB) cable, anEthernet cable, or the like.

The sensor 110 is configured to determine a location of another vehicle(e.g., the secondary vehicle 150 of FIG. 1A) in the vicinity of thevehicle 100. In some embodiments, the outside viewer sensor 110 is acamera configured to detect image data. In some embodiments, the outsideviewer sensor 110 is a radar sensor configured to detect spatial data.In some embodiments, the outside viewer sensor 110 is a Light Detectionand Ranging (LIDAR) sensor also configured to detect spatial data. Insome embodiments, the ECU 202 determines spatial data based on detectedimage data using image processing.

The memory 208 is configured to store vehicle recognition dataidentifying types of vehicles based on the image data or spatial datadetected by the outside viewer sensor 110. The memory 208 is alsoconfigured to store device data associated with the device 206,including the location of the display screen 106 within the vehicle 100.

The window 102 is capable of being in a transparent state or an opaquestate and transitioning between the two states. In some embodiments, theentire window 102 is in the transparent state or the opaque state. Thewindow 102 may be made of multiple regions, each region capable of beingin the transparent state or the opaque state. In some embodiments, thewindow 102 is an electrically switchable glass, which is capable ofbeing transparent or opaque based on a voltage applied to the glass. Thevoltage causes particles within the glass to behave in a particularmanner, achieving the transparent or opaque states.

The ECU 202 is connected to the outside viewer sensor 110, the window102, the memory 208, the device 206 and the display screen 106. The ECU202 is configured to coordinate between the window 102, the displayscreen 106, and the outside viewer sensor 110 to obscure a view of thedisplay screen 106 to the outside viewer, as described herein. In someembodiments, the ECU 202 is a controller, such as a privacy controlleror a window opacity controller configured to control or instruct thewindow 102, the display screen 106, and the outside viewer sensor 110.

The rear view mirror 104 is connected to the ECU 202 and includes adriver eye sensor 1004 configured to determine a direction a driver ofthe vehicle 100 is looking at. The window 102 may adjust opacity basedon the direction the driver is looking. When window 102 is set to anopaque state in order to obscure the view of the display screen 106, thedriver's view may consequently also be obstructed. Therefore, in orderto provide an unobstructed view for the driver, the driver eye sensor1004 detects when the driver is looking into the window 102 so that thewindow 102 may be set to a transparent state.

FIG. 2B is a block diagram of the vehicle 250 with a separate device260, in accordance with embodiments of the invention. The vehicle 250includes an ECU 254, a window 256, an outside viewer sensor 252, amemory 266, a transceiver 258, and a rear view mirror 268 with a drivereye sensor 270. The ECU 254, the window 256, the outside viewer sensor252, the memory 266, and the rear view mirror 268 with the driver eyesensor 270 are similar to the ECU 202, the window 102, the outsideviewer sensor 110, the memory 208, and the rear view mirror 104 with thedriver eye sensor 1004 of FIG. 2A and are configured to performsimilarly. The vehicle transceiver 258 is configured to transmit andreceive data to and from other devices, including the device 260. Insome embodiments, the ECU 254 communicates with the device 260 via thevehicle transceiver 258 using a wireless communications protocol such asBluetooth or Wi-Fi Direct. In some embodiments, the ECU 254 communicateswith the device 260 via a wired communications protocol, such as a CANbus. In some embodiments, the vehicle 250 communicates with othervehicles via the vehicle transceiver 258 using a vehicle-to-vehiclecommunications protocol, such as DSRC.

The device 260 includes a display screen 262 and a device transceiver264. The device transceiver 264 is configured to transmit and receivedata to and from other devices. In some embodiments, the device 260communicates with the ECU 254 of the vehicle 250 via the devicetransceiver 264 using a wireless communications protocol. In someembodiments, the device 260 communicates with the ECU 254 via a wiredcommunications protocol, such as a CAN bus.

The device 260 is physically within the boundaries of the vehicle 250but may not be a permanent part of the vehicle 250. In some embodiments,the device 260 is a third-party navigation system attached to awindshield or a dashboard. In some embodiments, the device 260 is amobile device attached to the vehicle 250 or in the possession of anoccupant of the vehicle 250. The device 260 has a display screen 262similar to the display screen 106 of FIG. 2A.

FIG. 3 illustrates the vehicle 100 from a point of view of an outsideviewer, in accordance with an embodiment of the invention. As comparedto FIG. 1B, the display screens 106 appear darkened and are unable to beviewed by the outside viewer. The rest of the window 102 is capable ofbeing seen through. The outside viewer is able to see through thevehicle 100 onto oncoming traffic issues, such as a stalled vehicle,oncoming traffic, or traffic congestion.

In an exemplary embodiment, the ECU 202, connected to the window 102 andthe device 206 having the display screen 106, rapidly alternates thewindow 102 between an opaque state and a transparent state, andsimultaneously, the ECU 202 rapidly alternates the display screen 106 ofthe device 206 between a displaying state and a non-displaying state.The window 102 is in the opaque state when the display screen 106 is inthe displaying state and the window 102 is in the transparent state whenthe display screen 106 is in the non-displaying state. As a result, thedisplay screen 106 is obscured from the view of the outside viewer, asillustrated in FIG. 3.

FIG. 4 is a graph of respective states of the window 102 and the displayscreen 106 inside the vehicle 100. As described herein, the displayscreen 106 and the window 102 rapidly alternate between states at acommon or the same predetermined frequency. When the window 102 isviewed individually while the window 102 rapidly alternates betweenopaque and transparent states, the predetermined frequency is such thatthe alternating is unable to be detected by human vision. In someembodiments, the predetermined frequency of alternating states is atleast 30 Hz. In some embodiments, while the window 102 rapidlyalternates between opaque and transparent states, the window 102 iscapable of being seen through.

Likewise, when the display screen 106 is viewed individually while thedisplay screen 106 rapidly alternates between the displaying andnon-displaying states, the predetermined frequency is such that thealternating of states is unable to be detected by human vision. In someembodiments, when viewing the display screen 106 individually while thedisplay screen 106 alternates between the displaying and non-displayingstates, what is displayed on the display screen 106, such as a scenefrom a movie or a map with navigation instructions, is able to be seen.

As shown in FIG. 4, before time t1, the display screen 106 is in anon-displaying state and the window 102 is in a transparent state. Anoutside viewer is able to see through the window 102, but sees nothingon the display screen 106, as it is in the non-displaying state.

At time t1, the display screen 106 transitions from the non-displayingstate to the displaying state and the window 102 transitions from thetransparent state to the opaque state. Accordingly, the outside vieweris unable to see through the window 102, and is unable to see thedisplay screen 106 in the display state.

At time t2, the display screen 106 transitions from the displaying stateto the non-displaying state and the window 102 transitions from theopaque state to the transparent state. As was the case before time t1,the outside viewer is able to see through the window 102, but seesnothing on the display screen 106, as it is in the non-displaying state.

The window 102 and the display screen 106 continue synchronizedalternating between the respective states through time t3, t4, t5, t6,etc., as long as the device 206 which includes display screen 106 ispowered on. When the device 206 is powered off, the display screen is ina continuous non-displaying state and the window 102 may be in acontinuous transparent state.

In some embodiments, the ECU 202 instructs each of the window 102 andthe display screen 106 to transition at the same time. For example, attime t1, the ECU 202 communicates an indication to the window 102 totransition from the transparent state to the opaque state. In someembodiments, the indication is a change of a voltage applied to thewindow 102. In the same example, at time t1, the ECU 202 communicates anindication to the display screen 106 to transition from thenon-displaying state to the displaying state. In some embodiments, theindication is communicated to the device 206, which controls the displayscreen 106. In some embodiments, when the display screen 106 and the ECU202 are connected wirelessly, the indications are communicated viarespective transceivers (e.g., the device transceiver 264 and thevehicle transceiver 258 of FIG. 2B).

In some embodiments, the device 206 communicates an indication to thewindow 102 to transition states. In some such embodiments, the device206 may communicate with the window 102 via the ECU 202. For example, attime t1, the display screen 106 transitions from the non-displayingstate to the displaying state. Accordingly, the device 206 communicatesan indication to the ECU 202 to instruct the window 102 to transitionfrom the transparent state to the opaque state. The ECU 202 communicatesthe indication to the window 102 to transition from the transparentstate to the opaque state. In some embodiments, the transmission ofinstructions is sufficiently fast that a lag is not detectable by humanvision. In some embodiments, a lag time is accounted for, such that therespective transitions of state of the display screen 106 and the window102 occur at the same time (e.g., at time t1, t2, t3, etc.).

In some embodiments, the ECU 202 communicates to both the display screen106 and the window 102, a predetermined frequency at which to alternatestates and a start signal to begin the alternating of states. In someembodiments, the ECU 202 periodically calibrates the display screen 106and the window 102, to ensure the transitioning of states remainssynchronized.

FIG. 5 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention. Initially, it is determined whether adisplay screen 106 located in the vehicle 100 is powered on (step 502).In some embodiments, when the device 206 is powered on, the displayscreen 106 is also powered on and in a displaying state. The device 206may communicate, to the ECU 202, an indication that the device 206and/or the display screen 106 are powered on. In some embodiments, thedisplay screen 106 enters a non-displaying state after a predeterminedamount of time passes and the device 206 is not interacted with. Forexample, when the device 206 is a video game system, if it does notreceive any input from a video game controller, the display screenassociated with the video game system may turn off, in order to conserveenergy.

When the display screen 106 is powered on, the display screen 106alternates between a displaying state and a non-displaying state, asdescribed herein (step 504). In some embodiments, the display screen 106alternates at a predetermined frequency that is sufficiently high suchthat the alternating is not detectable by human vision.

A window 102 of the vehicle 100 also alternates between an opaque stateand a transparent state (step 506). The window 102 alternates at thesame frequency as that of the display screen 106, and when the displayscreen 106 is in the displaying state, the window 102 is in the opaquestate, and when the display screen 106 is in the non-displaying state,the window 102 is in the transparent state. In some embodiments, thewindow 102 is a rear window. In some embodiments, the window 102 is aside window. When the display screen 106 is powered off or turned off,the window 102 is set to a transparent state, as the display screen 106is in a non-displaying state.

In some embodiments of the system, instead of alternating states of thedisplay screen 106 and the window 102, the window 102 is set to anopaque state when the device 206 is powered on and the display screen106 is also powered on and in a displaying state. FIG. 6 illustrates thevehicle 100 from the point of view of an outside viewer in accordancewith these embodiments.

In FIG. 6, the window 102 of the vehicle 100 is entirely opaque, as thedisplay screen 106 inside the vehicle 100 is in a displaying state. Inan example embodiment, when the device 206 is an integratedentertainment unit having a display screen 106, and an occupant of thevehicle 100 powers the entertainment unit on and begins watching amovie, the window 102 is set to the opaque state. When the occupanteither turns off the entertainment unit or the movie is paused and/orthe display screen 106 is set to a non-displaying state to conserveenergy, the window 102 is set to the transparent state. In someembodiments, the system may be disabled by an occupant or an operator ofthe vehicle 100 based on user preferences. For example, the occupant orthe operator of the vehicle 100 may prefer to disable the display screensafety and privacy system based on the time of day, the speed of thevehicle 100, the number of passengers in the vehicle 100, or the numberof other detected vehicles in the vicinity of the vehicle 100.

FIG. 7 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention. Initially, it is determined whether adisplay screen 106 of a device 206 located in a vehicle 100 is poweredon (step 702). In some embodiments, the device 206 communicates anindication to the ECU 202 that the device 206 and the display screen 106are powered on.

When the device 206 and the display screen 106 are powered on, whetherthe display screen 106 of the device 206 is in a displaying state isdetermined (step 704). As described herein, the display screen 106 ofthe device 206 may generally be in a displaying state when the device206 and the display screen 106 are powered on, but the display screen106 may be in a non-displaying state when the device 206 is in an energyconserving inactive mode.

When the display screen 106 is in a displaying state, the window 102 ofthe vehicle 100 is set to an opaque state (step 706). In someembodiments, the entire window 102 of the vehicle 100 may be set to theopaque state to ensure that privacy of the display screens 106 insidethe vehicle 100 is established, as shown in FIG. 6.

In some embodiments, the device 206, when setting the display screen 106to the displaying state, communicates an indication to the window 102via the ECU 202 of the vehicle 100, to set the window 102 to the opaquestate. In some embodiments, only a rear window is set to the opaquestate. In some embodiments, all the windows are set to the opaque state.In some embodiments, all the windows are set to the most opaque state asallowable by the jurisdiction in which the vehicle is located. Forexample, the laws of the jurisdiction where the vehicle is located mayestablish that the rear window may be completely opaque, the rear sidewindows may be up to 90% opaque, the front side windows may be up to 30%opaque, and the front windshield may not be opaque at all. In thissituation, when the display screen 106 within the vehicle 100 is in thedisplaying state, the rear window is set to be completely opaque, therear side windows are set to be 90% opaque, the front side windows areset to be 30% opaque, and the front windshield is set to be 0% opaque.

When the device 206 is not powered on or when the display screen 106 isnot in a displaying state (e.g., a non-displaying state, as describedherein), the window 102 is set to the transparent state (step 708). Insome embodiments, the device 206 periodically communicates an indicationto the ECU 202 that the display screen 106 is in a displaying state, tokeep the window 102 opaque. When the ECU 202 does not receive theperiodic indication, the ECU 202 may communicate an instruction to thewindow 102 to set the window 102 to the transparent state.

In some embodiments of the system, instead of setting the entire window102 to an opaque state, only portions of the window 102 are set to theopaque state to cover or obscure the display screen 106, from the pointof view of an outside viewer. FIG. 8A illustrates a vehicle 100 with thewindow 102 and the display screen 106 and an outside viewer 804 in somesuch embodiments.

The system detects an outside viewer 804 using a sensor 110 (andassociated detection and/or processing devices) of the vehicle 100, asdescribed herein. In some embodiments, the outside viewer 804 is in asecondary vehicle (as shown in FIG. 1A). In some embodiments, theoutside viewer 804 is an individual pedestrian on foot.

The system also detects an outside viewer location 812 using the outsideviewer sensor 110 (and associated detection and/or processing devices).In some embodiments, the outside viewer location 812 is an eye locationor an eye level of the outside viewer 804. In some embodiments, ECU 202of the vehicle determines location coordinates of the outside viewerlocation 812.

The display screen 106 is located within the vehicle 100 at the displayscreen location 810. In some embodiments, the display screen location810 is stored in the memory 208 of the vehicle 100 as locationcoordinates within the vehicle 100.

Based on the display screen location 810 and the outside viewer location812, a viewing region 806 located at viewing region location 808 isdetermined. The viewing region 806 corresponds to the area of the window102 that the outside viewer 804 views the display screen 106 through.

Once the viewing region 806 is determined, the viewing region 806 is setto an opaque state, so that the display screen 106 is obscured to theoutside viewer 804. In many embodiments, the system updates the outsideviewer location 812 periodically or continuously and updates the viewingregion location 808 so that the outside viewer 804 is unable to maneuveraround the viewing region 806 to view the display screen 106. Anoccupant 802 of the vehicle 100 viewing the display screen 106 isunaffected, as the window 102 having the viewing region 806 is notbetween the occupant 802 and the display screen 106.

Turning to FIG. 8B, an illustration of more than one display screenwithin the vehicle 100 is shown. The vehicle 100 contains a firstdisplay screen 852 at a first display screen location 856 and a seconddisplay screen 854 at a second display screen location 858.

As described herein, the sensor 110 detects image data or spatial dataassociated with the outside viewer 804 who may be in a secondary vehicle(as shown in FIG. 1A), or who may be on foot. The ECU 202 determines anoutside viewer location 870 based on the detected image data or spatialdata.

The ECU 202 determines a first viewing region 860 corresponding to thefirst display screen 852. As described herein, the ECU 202 determinesthe first viewing region 860 based on the outside viewer location 870and the first display screen location 856. The ECU 202 also determines asecond viewing region 862 corresponding to the second display screen 854based on the outside viewer location 870 and the second display screenlocation 858.

Once the first viewing region 860 located at a first viewing regionlocation 864 and the second viewing region 862 located at a secondviewing region location 866 are determined, the first viewing region 860and the second viewing region 862 are set to an opaque state. Theremaining portion of the window 102 is set to a transparent state. Anynumber of detected outside viewers and display screens within thevehicle may be accounted for by the system, resulting in any portion ofthe window 102 being set to the opaque state.

FIG. 9 illustrates an example of a flowchart describing an operation ofthe vehicle display screen safety and privacy system, according to anembodiment of the invention. While the process 900 is discussed withrespect to components shown in FIG. 2A in a situation shown in FIG. 8A,the steps of the process 900 may be performed using any combination ofthe components in FIG. 2A or 2B and situations shown in FIG. 8A or 8B.

Initially, spatial data is detected by an outside viewer sensor 110(step 902). In some embodiments, the spatial data indicates a relativelocation of a secondary vehicle (as shown in FIG. 1A) to a referencepoint of the vehicle 100. In some embodiments, the spatial dataindicates a relative location of an outside viewer 804 within thesecondary vehicle to the reference point of vehicle 100. It is alsodetermined whether the display screen 106 of the device 206 is poweredon, as described herein (step 904).

An outside viewer location 812 is determined based on the detectedspatial data (step 906). In some embodiments, when the spatial datashows a vehicle, but not an outside viewer, the location of the outsideviewer may be inferred. In some embodiments, in order to determine theoutside viewer location 812, a type of vehicle associated with thesecondary vehicle may be determined. The spatial data may be comparedagainst vehicle recognition data stored in the memory 208 to determine atype of vehicle associated with the secondary vehicle. The spatial datamay include data points associated with the secondary vehicle bumperlocation, grill features, headlight features, and manufacturer emblemshape. The spatial data may be compared by the ECU 202 against thevehicle recognition data to determine that the secondary vehicle is avehicle of a particular make and model. Based on the make and model ofthe vehicle, an approximate outside viewer location 812 may bedetermined, assuming driver and passenger positions within a givenvehicle remain relatively constant from person to person. For example, adriver in a low sports car is likely to sit lower than a driver of atall truck. Accordingly, the driver of the low sports car is likely tohave a lower viewing angle of the interior display screen of the vehiclein front of it than the driver of the tall truck. In some embodiments,the outside viewer location 812 is a set of location coordinatesrelative to a fixed reference point of the vehicle 100. Furthermore, thearea of the window that is transitioned may include a safety margin (orpad) around the expected view of the driver behind the vehicle using thedisplay screen safety and privacy system.

In some embodiments, when the spatial data is sufficiently precise forthe ECU 202 to detect an outside viewer 804 within the secondaryvehicle, an outside viewer location 812 may be determined directly fromthe spatial data. A viewing region 806 of the window 102 through whichthe outside viewer 804 views the display screen 106 is determined (step908). The ECU 202 determines the viewing region 806 based on the outsideviewer location 812 and a display screen location 810.

The display screen location 810 may be determined by a set of locationcoordinates within the vehicle 100 associated with the display screen106, when the display screen 106 is at a fixed location. When thedisplay screen 106 is part of a separate device (as shown in FIG. 2B),the device of the display screen 106 may identify the display screenlocation 810 to the ECU 202 relative to a fixed reference point of thevehicle 100. In some embodiments, when the display screen is part of aseparate device, the display screen location 810 is determined by theECU 202 using sensors within the passenger cabin or compartment of thevehicle 100. For example, the display screen 106 may be located using asystem of RFID tags and sensors to approximate the location of thedisplay screen 106 within the vehicle 100.

In some embodiments, the ECU 202 determines the viewing region location808 of the viewing region 806 by modeling the outside viewer 804relative to the window 102 and the display screen 106. In someembodiments, the ECU 202 determines a field of view from the outsideviewer location 812, and determines a displaying field of the displayscreen 106. Where the field of view and the displaying field intersecton the window 102 may be determined to be the viewing region 806. Whilethe figures illustrate the viewing region as a rectangle, the viewingregion may be any shape, as determined by the ECU 202 of the vehicle100.

The viewing region 806 is set to an opaque state (step 910). In someembodiments, the remaining portion of the window 102 is set to atransparent state. Thus, an occupant 802 of the vehicle 100 is able toview the display screen 106 but the outside viewer 804 is unable to viewthe display screen 106, as the viewing region 806 of the window 102 isin the opaque state.

The viewing region may be constantly or periodically updated byrepeating the steps of the process 900 in order to prevent the outsideviewer from being able to maneuver in a manner to view the displayscreen 106. In an example embodiment, the outside viewer sensor 110 maydetect updated spatial data, and the ECU 202 may determine an updatedoutside viewer location based on the updated image or spatial data. TheECU 202 may also determine an updated viewing region based on theupdated outside viewer location. Accordingly, the updated viewing regionof the window 102 is set to the opaque state and a remainder of thewindow 102 is set to a transparent state. In some embodiments, theupdated viewing region is determined and the updated viewing region isset to the opaque state with a response time such that the outsideviewer 804 is unable to maneuver around the viewing region 806 to viewthe display screen 106. In some embodiments, the window 102 isconfigured to be able to transition between an opaque state and atransparent state quickly enough to provide updated viewing regionadjustments.

FIGS. 10A-10C illustrate a scenario where the window 102 is dynamicallyset to a transparent state based on whether the driver 1002 is lookingthrough the window 102. In some situations, when the window 102 is setto an opaque state, a driver's rearward view may be obstructed by thewindow 102 (or regions thereof) being made opaque. In response, thesystem may adjust when the window 102 is set to the opaque state basedon a determination of whether the driver is looking through the window102.

In FIG. 10A, the driver 1002 of the vehicle 100 is looking forward atthe road ahead of the driver 1002. At the same time, the window 102 hastwo viewing regions 1006 and 1008 that are opaque in order to obscurethe view of one or more display screens 106 within the vehicle 100. Thevehicle 100 includes a rear view mirror 104 with a driver eye sensor1004. The driver eye sensor 1004 is configured to detect when the driver1002 is looking into the rear view mirror 104 and through the window102. The two viewing regions 1006 and 1008 are viewable in the rear viewmirror 104. In FIG. 10A, as the driver 1002 is not looking into the rearview mirror 104, the two viewing regions 1006 and 1008 remain opaque.

In an alternate embodiment, as shown in FIG. 10B, the entire window 102may be opaque, resulting in a viewing region 1010 that occupies theentire window 102 and is viewable from the rear view mirror 104.

In FIG. 10C, the driver 1002 of the vehicle 100 is looking into the rearview mirror 104. The driver eye sensor 1004 of the rear view mirror 104detects that the driver is looking into the rear view mirror 104 andaccordingly the window 102 is set to the transparent state. In someembodiments, the driver eye sensor 1004 detects the eyes of the driverand detects gaze data indicating where the eyes are looking. The drivereye sensor 1004 may provide the gaze data to the ECU 202, whichdetermines whether the driver 1002 is looking into the rear view mirror104, and consequently, whether to set the window 102 to the transparentstate.

While FIGS. 10A-10C illustrate the driver viewing a rear window 102, ifa side window is set to an opaque state, the system may set the sidewindow to a transparent state when the system determines the driver islooking through the side window, using the driver eye sensor 1004. Insome embodiments, the driver eye sensor 1004 is not a part of the rearview mirror and may be located anywhere within the passenger cabinproximate to the driver in order to detect gaze data of the driver'seyes.

In some embodiments of the vehicle display screen safety and privacysystem, the display screen 106 is obscured by use of two polarized lightfilters applied to the window 102 and the display screen 106. FIG. 11illustrates a vehicle 100 having a display screen 106 and a window 102.The display screen 106 has a polarized light filter 1106 oriented in afirst direction. In this example embodiment, the display screen 106 hasa polarized light filter 1106 oriented 90 degrees from vertical.Additionally, the window 102 has a polarized light filter 1108 orientedin a second direction perpendicular to the first direction. In thisexample embodiment, the window 102 has a polarized light filter 1108oriented 0 degrees from vertical.

As the window 102 has a polarized light filter 1108 oriented in adirection perpendicular to the polarized light filter 1106 of thedisplay screen 106, the light emitted from the display screen 106 isblocked from the view of an outside viewer 804. The obscured region 1102is created by the two filters filtering out all of the light from thedisplay screen 106.

An occupant 1104 inside the vehicle 100 is able to view the displayscreen 106, but the outside viewer 804 is unable to see the displayscreen 106 as the light is blocked, creating the obscured region 1102 nomatter where the outside viewer 804 is located.

In some embodiments, the polarized light filters 1106 and 1108 aremovable and may be configured to be applied or retracted from coveringthe display screen 106 and the window 102, respectively. In someembodiments, the polarized light filter 1108 of the window 102 isapplied when the display screen 106 is in a displaying state. In somesuch embodiments, the ECU 202 communicates an indication to thepolarized light filter 1108 of the window 102 to be applied to thewindow, in response to a detection of the display screen 106 being in adisplaying state.

Exemplary embodiments of the methods/systems have been disclosed in anillustrative style. Accordingly, the terminology employed throughoutshould be read in a non-limiting manner. Although minor modifications tothe teachings herein will occur to those well versed in the art, itshall be understood that what is intended to be circumscribed within thescope of the patent warranted hereon are all such embodiments thatreasonably fall within the scope of the advancement to the art herebycontributed, and that that scope shall not be restricted, except inlight of the appended claims and their equivalents.

What is claimed is:
 1. A system for improving safety while providingprivacy for a vehicle, the system comprising: a display screen locatedwithin the vehicle, and configured to alternate between a displayingstate and a non-displaying state; a window of the vehicle configured toalternate between an opaque state and a transparent state; and anelectronic control unit (ECU) connected to the window and the displayscreen, the ECU configured to: determine whether the display screen ispowered on, alternate the display screen between the displaying stateand the non-displaying state at a predetermined frequency when thedisplay screen is powered on, and alternate the window between theopaque state and the transparent state at the predetermined frequency,the display screen being in the displaying state when the window is inthe opaque state and the display screen being in the non-displayingstate when the window is in the transparent state.
 2. The system ofclaim 1, wherein the predetermined frequency exceeds a value such thatthe alternating of the display screen between the displaying state andthe non-displaying state and the alternating of the window between theopaque state and the transparent state are undetectable using humanvision.
 3. The system of claim 1, wherein the window is made of LCDglass configured to transition between the transparent state and theopaque state based on a voltage applied to the window.
 4. The system ofclaim 1, wherein the display screen is for a device integrated into thevehicle and configured to communicate, to the ECU, an indication thatthe display screen is powered on.
 5. The system of claim 1, wherein thedisplay screen is for a device separate from the vehicle and configuredto communicate, to the ECU via a transceiver, an indication that thedisplay screen is powered on.
 6. The system of claim 1, wherein the ECUis further configured to determine whether the display screen is turnedoff, and set the window to the transparent state when the display screenis turned off.
 7. The system of claim 1, wherein the window is a rearwindow of the vehicle, such that view of the display screen is obscuredto an outside viewer located behind the vehicle.
 8. A vehiclecomprising: a display screen located at a display screen location withinthe vehicle; a window having a plurality of regions, each regionconfigured to transition between an opaque state and a transparentstate; an outside viewer sensor configured to detect spatial dataassociated with an outside viewer located outside of the vehicle; and anelectronic control unit (ECU) configured to: determine whether thedisplay screen is powered on, determine an outside viewer location basedon the spatial data when the display screen is powered on, determine aviewing region of the window through which the outside viewer views thedisplay screen based on the display screen location and the outsideviewer location, and set the viewing region of the window to the opaquestate.
 9. The vehicle of claim 8, wherein the vehicle further comprisesa driver eye sensor configured to determine whether a driver of thevehicle is looking at a rear view mirror of the vehicle, and wherein theECU is further configured to transition the viewing region of the windowfrom the opaque state to the transparent state when the driver of thevehicle is looking at the rear view mirror.
 10. The vehicle of claim 8,wherein the outside viewer sensor is further configured to detectupdated spatial data associated with the outside viewer, and wherein theECU is further configured to: determine an updated outside viewerlocation based on the updated spatial data, determine an updated viewingregion of the window through which the outside viewer views the displayscreen based on the display screen location and the updated outsideviewer location, and set the updated viewing region of the window to theopaque state.
 11. The vehicle of claim 8, wherein the vehicle furthercomprises a second display screen located at a second display screenlocation within the vehicle, and wherein the ECU is further configuredto: determine a second viewing region of the window through which theoutside viewer views the second display screen based on the seconddisplay screen location and the outside viewer location, and set thesecond viewing region of the window to the opaque state.
 12. The vehicleof claim 8, wherein the ECU is further configured to: detect vehiclerecognition data of a secondary vehicle located behind the vehicle basedon the spatial data; and determine the outside viewer location based onthe vehicle recognition data.
 13. The vehicle of claim 8, wherein thewindow is made of LCD glass configured to independently transition eachof the plurality of regions between the transparent state and the opaquestate based on a voltage applied to the window.
 14. The vehicle of claim8, wherein the window is a rear window of the vehicle, such that view ofthe display screen is obscured to an outside viewer located behind thevehicle.
 15. A method for improving safety while providing privacy for avehicle having a rear window and a display screen located at a displayscreen location, the method comprising: detecting, by an outside viewersensor, spatial data associated with an outside viewer located outsideof the vehicle; determining, by an electronic control unit (ECU),whether the display screen is powered on; determining an outside viewerlocation based on the spatial data when the display screen is poweredon; determining, by the ECU, a viewing region of the window throughwhich the outside viewer views the display screen based on the displayscreen location and the outside viewer location; and setting, by theECU, the viewing region of the window to the opaque state.
 16. Themethod of claim 15, further comprising: determining, by a driver eyesensor, whether a driver of the vehicle is looking at a rear view mirrorof the vehicle; and setting, by the ECU, the viewing region of thewindow to the transparent state when the driver of the vehicle islooking at the rear view mirror.
 17. The method of claim 15, furthercomprising: detecting, by the outside viewer sensor, updated spatialdata associated with the outside viewer; determining, by the ECU, anupdated outside viewer location based on the updated spatial data;determining, by the ECU, an updated viewing region of the window throughwhich the outside viewer views the display screen based on the displayscreen location and the updated outside viewer location; and setting, bythe ECU, the updated viewing region of the window to the opaque state.18. The method of claim 15, further comprising: determining, by the ECU,a second viewing region of the window through which the outside viewerviews a second display screen located at a second display screenlocation based on the second display screen location and the outsideviewer location; and setting, by the ECU, the second viewing region ofthe window to the opaque state.
 19. The method of claim 15, furthercomprising: detecting, by the ECU, vehicle recognition data of asecondary vehicle located behind the vehicle based on the spatial data;and determining, by the ECU, the outside viewer location based on thevehicle recognition data.
 20. The method of claim 15, wherein the windowis made of LCD glass configured to independently transition each of theplurality of regions between the transparent state and the opaque statebased on a voltage applied to the window.